Add custom cup!

In all sports games, it is possible to customize the teams or groups before starting a new competition. Why doesn't the NHL handle this? If we play in the world championships, we will always play the same matches against the same teams. Same for the Spengler or the Champions League. Whereas on FIFA, you can very well play the Champions League with any team! Or even change the groups so you don't always do the same competition on repeat! Is there something new coming with nhl26?